return
{
[1] = {x1=1,x2="xx",x3=2,x4=2.5,},
[2] = {x1=2,x2="zz",x3=2,x4=4.3,},
[3] = {x1=3,x2="ww",x3=2,x4=5,},
[4] = {x1=4,x2="ee",x3=2,x4=6,},
}